diff --git a/docs/Arguments.md b/docs/Arguments.md
index 6d8a3c0d..dfe06df9 100644
--- a/docs/Arguments.md
+++ b/docs/Arguments.md
@@ -32,7 +32,7 @@ usage: -m llumnix.entrypoints.vllm.api_server [-h]
             [--profiling-result-file-path PROFILING_RESULT_FILE_PATH]
             [--gpu-type GPU_TYPE]
             [--polling-interval POLLING_INTERVAL]
-            [--migration-backend {gloo,nccl,rpc,grpc,kvtransfer}]
+            [--migration-backend {gloo,nccl,rayrpc,grpc,kvtransfer}]
             [--migration-buffer-blocks MIGRATION_BUFFER_BLOCKS]
             [--migration-backend-transfer-type {cuda_ipc,rdma,}]
             [--migration-backend-kvtransfer-naming-url MIGRATION_BACKEND_KVTRANSFER_NAMING_URL]
@@ -147,8 +147,8 @@ usage: -m llumnix.entrypoints.vllm.api_server [-h]
 
 `--migration-backend`
 - Communication backend of migration.
-- Possible choices: gloo, rpc, grpc, kvtransfer. [gloo, rpc] are available for vllm and [grpc, kvtransfer] are available for bladellm.
-- Default: "rpc"
+- Possible choices: gloo, rayrpc, grpc, kvtransfer. [gloo, rayrpc] are available for vllm and [grpc, kvtransfer] are available for bladellm.
+- Default: "rayrpc"
 
 `--migration-backend-transfer-type`
 - Transfer type for migration backend grpc and kvTransfer.
diff --git a/docs/Quickstart.md b/docs/Quickstart.md
index 78024cb5..4fcd605f 100644
--- a/docs/Quickstart.md
+++ b/docs/Quickstart.md
@@ -22,7 +22,7 @@ cd llumnix
 make install
 ```
 
-The default migration backend is RPC. If you want to use NCCL as the migration backend, run `make cupy-cuda` to install [cupy-cuda](https://pypi.org/search/?q=cupy-cuda) manually, as it is related to the CUDA version.
+The default migration backend is rayrpc. If you want to use NCCL as the migration backend, run `make cupy-cuda` to install [cupy-cuda](https://pypi.org/search/?q=cupy-cuda) manually, as it is related to the CUDA version.
 
 If you want to use Gloo as migration backend, **in addition to installing cupy-cuda**, please refer to [this link](https://github.com/ZeldaHuang/pygloo/blob/main/.github/workflows/ubuntu_basic.yml#L24C1-L26C1) to install [Bazel](https://github.com/bazelbuild/bazel) >= 5.1.0. Then, run `make pygloo` to install [pygloo](https://github.com/ZeldaHuang/pygloo).
 
diff --git a/llumnix/arg_utils.py b/llumnix/arg_utils.py
index 4ff3102e..4bad0cd4 100644
--- a/llumnix/arg_utils.py
+++ b/llumnix/arg_utils.py
@@ -317,8 +317,8 @@ def add_cli_args(parser: argparse.ArgumentParser) -> argparse.ArgumentParser:
                             help='profiling result file path')
         parser.add_argument('--migration-backend',
                             type=str,
-                            choices=['gloo','nccl','rpc','grpc','kvtransfer'],
-                            help='communication backend of migration, [gloo, rpc] are available for vllm \
+                            choices=['gloo','nccl','rayrpc','grpc','kvtransfer'],
+                            help='communication backend of migration, [gloo, rayrpc] are available for vllm \
                                 and [grpc, kvtransfer] are available for bladellm')
         parser.add_argument('--migration-backend-transfer-type',
                             type=str,
diff --git a/llumnix/backends/bladellm/llm_engine.py b/llumnix/backends/bladellm/llm_engine.py
index 83e3a9f4..557b1bc1 100644
--- a/llumnix/backends/bladellm/llm_engine.py
+++ b/llumnix/backends/bladellm/llm_engine.py
@@ -39,7 +39,7 @@
 from llumnix.instance_info import InstanceInfo
 from llumnix.queue.queue_type import QueueType
 
-class AsyncBackQueue(APIWrapper):
+class AsyncBackQueueWrapper(APIWrapper):
     def __init__(self, placement_group, node_id, instance_id, output_queue_type) -> None:
         super().__init__(args=None, resp_queue=None)
         if placement_group:
@@ -144,7 +144,7 @@ def instance_info(self) -> InstanceInfo:
     def start(self, loop: asyncio.AbstractEventLoop):
         super().start(loop)
         self._client = self.init_client_from_engine()
-        self.trans_wrapper: AsyncBackQueue = AsyncBackQueue(self.placement_group,
+        self.trans_wrapper: AsyncBackQueueWrapper = AsyncBackQueueWrapper(self.placement_group,
                               self.node_id, self.instance_id, self.output_queue_type)
         self._scheduler.llumnix_metrics.engine_init_metrics(self)
 
@@ -202,11 +202,9 @@ def __init__(self,
                 node_id: Optional[str],
                 *args, **kwargs,
                 ) -> None:
-        logger.info("aaa")
         AsyncLLMEngine.__init__(self, *args, **kwargs)
-        logger.info("bbb")
         AsyncLLMEngineLlumnixMixin.__init__(self, instance_id, output_queue_type, migration_config, placement_group, node_id)
-        logger.info("ccc")
+
 class PrefillAsyncLLMEngineLlumnix(AsyncLLMEngineLlumnixMixin, PrefillAsyncLLMEngine):
     def __init__(self,
             instance_id: str,
diff --git a/llumnix/backends/vllm/migration_backend.py b/llumnix/backends/vllm/migration_backend.py
index a6f2c375..f21c2bab 100644
--- a/llumnix/backends/vllm/migration_backend.py
+++ b/llumnix/backends/vllm/migration_backend.py
@@ -75,7 +75,7 @@ def __init__(self, migration_config: MigrationConfig, cache_engine: CacheEngine,
         self.migration_stream = torch.cuda.Stream()
 
     def init_backend(self, group_name, world_size, rank) -> bool:
-        logger.info("create rpc migration backend successfully.")
+        logger.info("create rayrpc migration backend successfully.")
         return True
 
     def destory_backend(self) -> None:
@@ -85,7 +85,7 @@ def destory_backend(self) -> None:
 
     def warmup(self) -> bool:
         self.actor.exec_method.remote(self.is_driver_worker, "do_send", [0])
-        logger.info("rpc migration backend warmup successfully.")
+        logger.info("rayrpc migration backend warmup successfully.")
         return True
 
     # The src actor will pack the kv-cache data layer by layer. Specifically, NumPy is used for the transfer
@@ -285,7 +285,7 @@ def get_migration_backend(migration_config: MigrationConfig, cache_engine: Cache
     target_migration_backend = None
     backend = migration_config.migration_backend
 
-    assert backend in ['nccl', 'gloo', 'rpc'], "Unsupported migration backend: {} for llumnix".format(backend)
+    assert backend in ['nccl', 'gloo', 'rayrpc'], "Unsupported migration backend: {} for llumnix".format(backend)
 
     if backend in ['nccl', 'gloo']:
         target_migration_backend = RayColMigrationBackend(migration_config, cache_engine, local_rank, scheduling_strategy,
diff --git a/llumnix/global_scheduler/migration_scheduler.py b/llumnix/global_scheduler/migration_scheduler.py
index 9c448ebf..61516dd7 100644
--- a/llumnix/global_scheduler/migration_scheduler.py
+++ b/llumnix/global_scheduler/migration_scheduler.py
@@ -33,8 +33,8 @@ def __init__(self,
         # to prevent instances of migration backends that have not been initialized from participating in migration.
         migration_backend_init_filter = CustomFilter()
         migration_backend_init_filter.set_filter_condtition(
-            src_filter=lambda _: migration_backend == 'rpc',
-            dst_filter=lambda _: migration_backend == 'rpc')
+            src_filter=lambda _: migration_backend not in ['gloo', 'nccl'],
+            dst_filter=lambda _: migration_backend not in ['gloo', 'nccl'])
         self.migration_filter.register_filter("migration_backend_init_filter",
                                               migration_backend_init_filter)
 
diff --git a/tests/e2e_test/test_e2e.py b/tests/e2e_test/test_e2e.py
index 24dd896e..87b03417 100644
--- a/tests/e2e_test/test_e2e.py
+++ b/tests/e2e_test/test_e2e.py
@@ -62,7 +62,7 @@ def run_vllm(model, max_model_len, sampling_params):
 @pytest.mark.asyncio
 @pytest.mark.skipif(torch.cuda.device_count() < 1, reason="at least 1 gpus required for e2e test")
 @pytest.mark.parametrize("model", ['/mnt/model/Qwen-7B'])
-@pytest.mark.parametrize("migration_backend", ['rpc', 'gloo'])
+@pytest.mark.parametrize("migration_backend", ['rayrpc', 'gloo'])
 @pytest.mark.parametrize("launch_mode", ['eief', 'eidf', 'dief', 'didf'])
 async def test_e2e(cleanup_ray_env, shutdown_llumnix_service, model, migration_backend, launch_mode):
     if migration_backend == 'gloo' and launch_mode != 'eief':
diff --git a/tests/e2e_test/test_migration.py b/tests/e2e_test/test_migration.py
index 700b8da3..ba0793da 100644
--- a/tests/e2e_test/test_migration.py
+++ b/tests/e2e_test/test_migration.py
@@ -90,11 +90,11 @@ def get_instance_num_blocks():
 @pytest.mark.asyncio
 @pytest.mark.skipif(torch.cuda.device_count() < 2, reason="at least 2 gpus required for migration bench")
 @pytest.mark.parametrize("model", ['/mnt/model/Qwen-7B'])
-@pytest.mark.parametrize("migration_backend", ['rpc', 'gloo'])
+@pytest.mark.parametrize("migration_backend", ['rayrpc', 'gloo'])
 @pytest.mark.parametrize("migrated_request_status", ['running', 'waiting'])
 async def test_migration_benchmark(cleanup_ray_env, shutdown_llumnix_service, model, migration_backend, migrated_request_status):
-    if migrated_request_status == 'waiting' and migration_backend != 'rpc':
-        pytest.skip("When the migrated request status is waiting, only test the rpc migration backend.")
+    if migrated_request_status == 'waiting' and migration_backend != 'rayrpc':
+        pytest.skip("When the migrated request status is waiting, only test the rayrpc migration backend.")
 
     request_migration_policy = 'SR' if migrated_request_status == 'running' else 'FCW'
     ip = "127.0.0.1"
diff --git a/tests/unit_test/backends/vllm/test_migration.py b/tests/unit_test/backends/vllm/test_migration.py
index d247e160..d73b130e 100644
--- a/tests/unit_test/backends/vllm/test_migration.py
+++ b/tests/unit_test/backends/vllm/test_migration.py
@@ -83,7 +83,7 @@ async def step_async_try_schedule():
 
         self.backend_engine.engine.step_async = step_async_try_schedule
 
-@pytest.mark.parametrize("migration_backend", ['rpc', 'gloo', 'nccl'])
+@pytest.mark.parametrize("migration_backend", ['rayrpc', 'gloo', 'nccl'])
 @pytest.mark.parametrize("migration_request_status", ['waiting', 'running'])
 @pytest.mark.asyncio
 async def test_migration_correctness(setup_ray_env, migration_backend, migration_request_status):
@@ -203,7 +203,7 @@ async def test_correctness(prompt):
         await test_correctness(prompt)
     que.cleanup()
 
-@pytest.mark.parametrize("migration_backend", ['rpc', 'gloo', 'nccl'])
+@pytest.mark.parametrize("migration_backend", ['rayrpc', 'gloo', 'nccl'])
 @pytest.mark.asyncio
 async def test_pd_diaggregation_correctness(setup_ray_env, migration_backend):
     engine_args = EngineArgs(model="facebook/opt-125m", worker_use_ray=True)
diff --git a/tests/unit_test/backends/vllm/test_migration_backend.py b/tests/unit_test/backends/vllm/test_migration_backend.py
index c6e23e10..5b92fb9c 100644
--- a/tests/unit_test/backends/vllm/test_migration_backend.py
+++ b/tests/unit_test/backends/vllm/test_migration_backend.py
@@ -37,7 +37,7 @@ def get_gpu_cache(self):
         return self.gpu_cache
 
 @pytest.mark.skipif(torch.cuda.device_count() < 2, reason="Need at least 2 GPU to run the test.")
-@pytest.mark.parametrize("backend", ['rpc', 'gloo', 'nccl'])
+@pytest.mark.parametrize("backend", ['rayrpc', 'gloo', 'nccl'])
 def test_migrate_cache(setup_ray_env, backend):
     engine_config = EngineArgs(model='facebook/opt-125m', max_model_len=8, enforce_eager=True).create_engine_config()
     migraiton_config = EngineManagerArgs(migration_buffer_blocks=3, migration_num_layers=5).create_migration_config()
diff --git a/tests/unit_test/backends/vllm/test_worker.py b/tests/unit_test/backends/vllm/test_worker.py
index a42b9f28..440bf6e9 100644
--- a/tests/unit_test/backends/vllm/test_worker.py
+++ b/tests/unit_test/backends/vllm/test_worker.py
@@ -56,7 +56,7 @@ def create_worker(rank: int, local_rank: int, engine_config: EngineConfig,
 
     return worker
 
-@pytest.mark.parametrize("backend", ['rpc', 'gloo', 'nccl'])
+@pytest.mark.parametrize("backend", ['rayrpc', 'gloo', 'nccl'])
 def test_reserve_memory_for_migration(setup_ray_env, backend):
     engine_config = EngineArgs(model='facebook/opt-125m', max_model_len=8, enforce_eager=True).create_engine_config()
     migration_config = EngineManagerArgs(migration_buffer_blocks=1).create_migration_config()
@@ -77,7 +77,7 @@ def test_reserve_memory_for_migration(setup_ray_env, backend):
     assert migration_cache_size == occupy_memory
 
 @pytest.mark.skipif(torch.cuda.device_count() < 2, reason="Need at least 2 GPU to run the test.")
-@pytest.mark.parametrize("backend", ['rpc', 'gloo', 'nccl'])
+@pytest.mark.parametrize("backend", ['rayrpc', 'gloo', 'nccl'])
 def test_rebuild_migration_backend(setup_ray_env, backend):
     engine_config = EngineArgs(model='facebook/opt-125m', max_model_len=8, enforce_eager=True).create_engine_config()
     migration_config = EngineManagerArgs(migration_buffer_blocks=1).create_migration_config()
diff --git a/tests/unit_test/global_scheduler/test_global_scheduler.py b/tests/unit_test/global_scheduler/test_global_scheduler.py
index 18c83f85..7079c96f 100644
--- a/tests/unit_test/global_scheduler/test_global_scheduler.py
+++ b/tests/unit_test/global_scheduler/test_global_scheduler.py
@@ -25,7 +25,7 @@
 def init_global_scheduler():
     global_scheduler_config = GlobalSchedulerConfig(0, 'remaining_steps', 'load', math.inf,
                                                     'defrag_constrained', 3.0, True, 'avg_load',
-                                                    10, 60, False, 'rpc')
+                                                    10, 60, False, 'rayrpc')
     global_scheduler = GlobalScheduler(global_scheduler_config)
     return global_scheduler
 
diff --git a/tests/unit_test/global_scheduler/test_llm_engine_manager.py b/tests/unit_test/global_scheduler/test_llm_engine_manager.py
index 16befae9..595512c1 100644
--- a/tests/unit_test/global_scheduler/test_llm_engine_manager.py
+++ b/tests/unit_test/global_scheduler/test_llm_engine_manager.py
@@ -105,7 +105,7 @@ def _get_lantecy_mem(self, *args, **kwargs):
 
 def init_manager():
     try:
-        engine_manager_args = EngineManagerArgs(migration_backend="rpc", enable_migration=True)
+        engine_manager_args = EngineManagerArgs(migration_backend="rayrpc", enable_migration=True)
         engine_manager_args.log_instance_info = False
         engine_manager = LLMEngineManager.from_args(engine_manager_args, None)
     except ValueError:
diff --git a/tests/unit_test/global_scheduler/test_migration_scheduler.py b/tests/unit_test/global_scheduler/test_migration_scheduler.py
index 89b813c3..3ed1655a 100644
--- a/tests/unit_test/global_scheduler/test_migration_scheduler.py
+++ b/tests/unit_test/global_scheduler/test_migration_scheduler.py
@@ -27,7 +27,7 @@
 
 def init_migration_scheduler(policy='balanced'):
     instance_load_calculator = InstanceLoadCalculator('remaining_steps', True)
-    migration_scheduler = MigrationScheduler(policy, MIGRATE_OUT_LOAD_THRESHOLD, instance_load_calculator, 'rpc')
+    migration_scheduler = MigrationScheduler(policy, MIGRATE_OUT_LOAD_THRESHOLD, instance_load_calculator, 'rayrpc')
     return migration_scheduler
 
 @pytest.fixture
diff --git a/tests/unit_test/llumlet/test_engine_step_exception.py b/tests/unit_test/llumlet/test_engine_step_exception.py
index 736520d2..50c621c0 100644
--- a/tests/unit_test/llumlet/test_engine_step_exception.py
+++ b/tests/unit_test/llumlet/test_engine_step_exception.py
@@ -51,7 +51,7 @@ async def raise_error_step():
 @pytest.mark.skipif(torch.cuda.device_count() < 1, reason="Need at least 1 GPU to run the test.")
 def test_engine_step_exception(setup_ray_env):
     engine_args = EngineArgs(model="facebook/opt-125m", max_model_len=8, worker_use_ray=True)
-    migration_config = MigrationConfig("SR", "rpc", 16, 1, 4, 5, 20)
+    migration_config = MigrationConfig("SR", "rayrpc", 16, 1, 4, 5, 20)
     node_id = ray.get_runtime_context().get_node_id()
     scheduling_strategy = NodeAffinitySchedulingStrategy(node_id=node_id, soft=False)